package com.gong.captcha.controller;


import cn.hutool.captcha.CaptchaUtil;
import cn.hutool.captcha.LineCaptcha;
import com.gong.captcha.model.CaptchaProperties;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.xml.crypto.Data;
import java.io.IOException;
import java.util.Date;

@RequestMapping("/captcha")
@RestController
public class CaptchaController {
    private final static long session_valid_timeout = 60 * 1000;

    @Autowired
    private CaptchaProperties captchaProperties;

    @RequestMapping("/get")
    public void getCaptcha(HttpServletResponse response , HttpSession session) throws IOException {
        LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(captchaProperties.getWidth(),captchaProperties.getHeight());
        //设置返回的类型
        response.setContentType("image/jpeg");
        //禁止缓存
        response.setHeader("Pragma", "No-cache");

        lineCaptcha.write(response.getOutputStream());
        session.setAttribute(captchaProperties.getSession().getKey(), lineCaptcha.getCode());
        session.setAttribute(captchaProperties.getSession().getDate(), new Date());
        response.getOutputStream().close();
    }

    @RequestMapping("/check")
    public Boolean check(String inputCode , HttpSession session){
        //验证码生成的内容和用户输入的进行比较
        if(!StringUtils.hasLength(inputCode)){
            return false;
        }
        //从session中去获取
        String savedCode = (String)session.getAttribute(captchaProperties.getSession().getKey());
        Date saveDate = (Date) session.getAttribute(captchaProperties.getSession().getDate());
        if(savedCode.equalsIgnoreCase(inputCode)){
            //判断验证码是否过期
            if(saveDate != null && System.currentTimeMillis() - saveDate.getTime()  < session_valid_timeout){
                return true;
            }
        }
        return false;
    }
}
